The ruler was invented in 1675 and unfortunately, to this day, no one knows by whom it was invented.
who is the inventor
Inventor
an accidental inventor is a inventor that always makes accidents
an inventor is a designer but a designer is not an inventor
There is no headache inventor.
who was the inventor of the dynamo?
inventor yacht
It does not have a single inventor.
when did this inventor live
inventor of fiberglass
who is inventor of hacksaw
in a dictatorship rulers